Fixes test run from Gradle

m3uparser/build.gradle

@@ -1,7 +1,7 @@
 buildscript {
     ext.kotlin_version = "1.2.41"
-    ext.junitPlatformVersion = "1.0.2"
-    ext.junitJupiterVersion = "5.0.2"
+    ext.junitPlatformVersion = "1.2.0"
+    ext.junitJupiterVersion = "5.2.0"
     ext.antlrVersion = "4.7"
     ext.assertJVersion = "3.9.1"
 
@@ -10,7 +10,6 @@ buildscript {
     }
     dependencies {
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
-        classpath("org.junit.platform:junit-platform-gradle-plugin:$junitPlatformVersion")
     }
 }
 
@@ -19,13 +18,16 @@ plugins {
     id "com.gradle.build-scan" version "1.13.1"
 }
 
+test {
+    useJUnitPlatform()
+}
+
 buildScan {
     termsOfServiceUrl = "https://gradle.com/terms-of-service"
     termsOfServiceAgree = "yes"
 }
 
 apply plugin: "kotlin"
-apply plugin: "org.junit.platform.gradle.plugin"
 apply plugin: "antlr"
 apply plugin: "idea"
 
@@ -43,10 +45,10 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version")
 
     testImplementation("org.junit.jupiter:junit-jupiter-api:$junitJupiterVersion")
+    testImplementation("org.junit.jupiter:junit-jupiter-params:$junitJupiterVersion")
     testImplementation("org.assertj:assertj-core:$assertJVersion")
 
     testRuntime("org.junit.jupiter:junit-jupiter-engine:$junitJupiterVersion")
-    testRuntime("org.junit.jupiter:junit-jupiter-params:$junitJupiterVersion")
     testRuntime("org.junit.platform:junit-platform-launcher:$junitPlatformVersion")
 }